From 57f50d70e27f99a9a785c760b2123cdf6a68e2de Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexdeucher@gmail.com>
Date: Sun, 14 Mar 2010 16:31:36 -0400
Subject: [PATCH] drm/radeon/kms/pm: fix segfault in clock code
Make sure we have a crtc assigned to the encoder
before dereferencing it.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
---
drivers/gpu/drm/radeon/radeon_pm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 6458d52be4eee..a4b57493aa78c 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -279,7 +279,8 @@ void radeon_pm_compute_clocks(struct radeon_device *rdev)
list_for_each_entry(connector,
&ddev->mode_config.connector_list, head) {
if (connector->encoder &&
- connector->dpms != DRM_MODE_DPMS_OFF) {
+ connector->encoder->crtc &&
+ connector->dpms != DRM_MODE_DPMS_OFF) {
radeon_crtc = to_radeon_crtc(connector->encoder->crtc);
rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id);
++count;
--
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